A jamb (from French jambe 'leg'),[1] in architecture, is the side-post or lining of a doorway or other aperture. The jambs of a window outside the frame are called reveals. Small shafts to doors and windows with caps and bases are called jamb-shafts; when in the inside arris of the jamb of a window, they are sometimes called scoinsons.[2]
A doorjamb, door jamb, or sometimes doorpost is the vertical portion of the door frame onto which a door is secured.[3] The jamb bears the weight of the door through its hinges, and most types of door latches and deadbolts extend into a recess in the doorjamb when engaged, making the accuracy of the plumb (i.e. true vertical) and strength of the doorjambs vitally important to the overall operational durability and security of the door.
The dimensions of door jambs depend on the size of the door, but typically, 4 ft 16 in, 5 ft 12 in, and 6 ft 16 in are among the most common measurements.[citation needed]
The word jamb is also used to describe a wing of a building, perhaps just in Scottish architecture. John Adam added a 'jamb' to the old Leith Customs house in the Citadel of Leith in 1754–1755.[4]
In arches and vaults, the soffit is the curved inner surface of the arch or vault located above the impost, as opposed to the outer surface called the arch or vault crest.[5]
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See also
References
- ^ "jamb". Merriam-Webster.com Dictionary.
- ^ One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Jamb". Encyclopædia Britannica. Vol. 15 (11th ed.). Cambridge University Press. p. 135.
- ^ Davies, Nikolas; Jokiniemi, Erkki (2012). Architect's Illustrated Pocket Dictionary. Routledge. p. 262. ISBN 9781136444067.
- ^ Edinburgh City Archives. Dean of Guild Court papers, warrant granted to John Adam on 27 June 1764 when he presented a full set of building accounts.
- ^ Koch, Wilfried (2012-07-30). Die Naturbeschreibung im Journal von Henry David Thoreau. Frankfurt: Peter Lang GmbH, Internationaler Verlag der Wissenschaften. doi:10.3726/978-3-653-01762-5. ISBN 978-3-653-01762-5.
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This page was last edited on 2 May 2024, at 17:31